Roller-gearing.



F. AL FRANZEN'.

ROLLER GEARINQ. APPLICATION FILED MAY 2I, Isla.

MWL I J www IIIIII 2,1 nw II I I@ @M my@ J, l/ n f om wflfWOx Mw, wfml/ m4 I m IIL .I W \\L N M w I u .nv M Il QW u @y V\I/v/ .,II I. m. %\I\I /QN o0 6 m NNMN l Patented Oct. 22, 1918.

4 SHEETvS-SHEET 2.

AN mwN QN F. A. FRANZEN.

ROLLER GEARFNG. APPLlcATloN FILED MAY 21,1913.

F. A. FRANZN.

ROLLER GEARING. APPLICATION FILED MAY 21. 1918.

Patented Oct. 22, 1918.

4 SHEETS-SHEET a'.

I. A. FRANZN.

ROLLER GEARING.

APPLICATION FILED MAY 2l. Isls.

Patented Oct. 22, 1918.

FRANS' AUG. FRANZN. or SWEDEN.

antisemitisme.

mariees?.

Specification of Letters Patent.

rammed news2', wie.

Application med Mayz, 191s'.` semina. 235371.

Be it lrnown'th'at I, lFRANS; AUGUST 'FRL/LN- ZN, a. citizeifrofSWeden, and residentof Lunch Sweden, have invented nenz and use ful Impr(Wenients`` inf- Roller-Grea,ri'njgjsik of which' the following isV a"speci'c`ation.

My invention relates to a i'ioisel'ess running" geariiiglbased "upony the theory of' the straight epicycloidalv motion; The "gea-ring consistso'ftwo Wheels' engaged in each other andl oneof then-iI being tprofided with r'olls running` in slots dianetricallyarranged in the other Wheel. Therelationlloetween the sizes of the pitch-circles otheivlieelsisfl 2 andthus the relatioirhetii'een the numbers of revolution of the shafts will be 1:2, though the ratioof` gearingniay be 'alteredl by `using` two orniore' roller"gealringfs of the saine kind.` d Y The characteristic feature oi" ythein venti(in is that the Wheel provided with rolls' consists of two plates betweenlwhich tlie pins carrying the' krolls are inou"n'tedandV that slots in onev of the vWhe'el'sarearrangedradially through a hat plate or disl extending :from the circumference 'of thewheel,-` said flange' hein'gin the saiielplane as tlie i olls. Bythis arrangement regular' andnbiseless running isi obtained and the duraliil-itylof the Aapparatus is increased. The invention Y comprisesa'lsocertai detailsjtlie construction andobject-of` which are hereinafter set fortlr andclaimeld. w Referring tof the, draitiingsif-Fi'gure shows a longitudinal* sect-ionofftheA apparatus; Figi 2 is an endview of the saine."` Fig. 3 lis a longitudinal section of a 'modified form 'of the intentiori,` and Fig! le is1 an end vie`v`7 o'fthesaine; Figi 54 is a-detailviewof the latter; -and Figs'. 6, 7 and `8 shottthe same in' modifiedforms;`

` According to' Figs;` lfand Qffthe apparatus consists 'of a casing' 'in two l'p'artsthat l he'sepaiated' frome'ach other/land in' Which the cvvofshafts' Q'fand Sfere: journaled. l If theratiooff gearing' istixed' tolk Z theisha'ft ber of d revolutions.

2' is supposedfto be the"drivi'ngfshaft'With the l'i'igher nuinber of; revolutions the shaft 3 Lthe driven one With' the'llo'nienurn- The *driveni shaft 3 is provided with a'cupsh'aped Wheel '4 carrying an annular' plate-:or han'ge 5T extending? from its cli'rcu'ini'erei'i'ce towardI thejshat and "provided with slots 6" cut right through the same and"v open toivard!the4 shaft. The :ninnbcr ofislots is `eight in the forni' shown. On thelrdriving shaft 2`two plates 7 and 8 are fastened said platesfcarrying journals 911er cylindrical rolls y1() the latter having a diameter a trifle smal-ler'than the Width of the slots 6. lhe plates 7 and 8 areflrept together at the center of the shaft 2" that ishere reducedto a pin of so small addiain'eter that thelplate can rotate'freely Without. the thereof hetweeii the slots Gstriking against` saidrpinl Thusltheplates 7 and 8 which form anlieel carrying the rolls are placed'one' oir each 'side of the flange 5, and thevrolls 10 are placed in the" same plane as sadange; d

` 1 As" the'nun'iber `of fthel slots G ist eight `four rolls- 10 inust be provided for andlsaidl rolls Will always tia'fel in a straight Vlinerelzv tively-to thepla'te 5 coinciding -witlr the diameter of the plate. Oi course, the pitch maybe ivaried in such a Way that a greater or smaller nuinber ofrolls and slots are' used, butlthe nui'nher of rolls' inu'st always be half of the number of slots.

l I`Onaccount ofthe'` rolls ltraveling diainetrically` in Arelation"tothe plate 5 no shocks arise in the direction of rotation and thus the' @apparatus runs noisele'ssly. The rollsL being' slightly smal-ler tlianfthcslots only touch Yoneof the sides of theslots and rollovei the saine" Without touching the opposite side.` AThe casing I is completely closed and `fi-lied `With oil that is caught by the platel 5' in isuch a Way that the apparatus is` liilo'ricated1` automatically. ln"`order` to further reduce the friction bali bearings may he provided rfor the journals 9 insteadof the rolls, the outer rings 'of said ball bearings seifvi'ng1 as rolls. 'The journals 9` ais-Welles the rolls 10 and theplate 5 consistof hard steel and theother Vparts may be inade oi' a softer land cheaper metal,` for instance of cast" iron. d

" -Iiiorder to'obtain 4atheoretically truelrunning by means of a gearing Vof the kind reerred'toA it is necessary: thatfone of the shaftsdoeshnot `vihrate'in relation t the other `rone ashlnight be the case especially Knihen the "apparatus istov be used' `for trans- :hittingV of largerlaniimts of powerand at greater' velocities', as the shaft carrying,` the rolls is-joiirnale'd only at one sideof the i n'orking surface ofthe rolls.` Moreover the rollsl are" `rotated 1n one direction at their entrance into theV slots and in the opposite direction when they leave the slots. A fter having left the slots the rolls will continue to rotate in the latter direction on account of their inertia and when they are entering into the slots again they rotate in a direction opposite to the direction required for their rolling into the slot without friction. This circumstance causes a shock that results in the vibration mentioned above. These disad vantages are avoided by the present invention by the shaft carrying the rolls on both sides of the working surfaces of the rolls and by braking the rolls after their leaving the slots and giving them an opposite direction of rotation. In this way all shocks and 1rregular vibrations are avoided irrespective of the amount of power to be transmitted and of the velocity.

The gearing consists, as shown in Figs. 3 and 2, of two shafts 13 and 14 in a common casing 12, one of said shafts 14 carrying a slotted disk or fiange 15 and the other one 13 a number of rolls 16 mounted in two flanges 16 and 17 firmly connected with the shaft 13. As stated above the diameter of the disk is twice as large as a circle drawn through the axis of rotation of the rolls 18 and thus the latter travel in the slots according Vto the theory of the straight epicycloid in such a way that the ratio of gearing is 1 :2.

According to the'invention a bearing 23 carries the inner free end 19 of the shaft 13 and said bearing is provided in a bent arm 20. The part of the arm perpendicular to the shaft is placed inside the inner flange 17 of the shaft 13 in the cup shaped flange 21 that is connected with the shaft 14 and carries the slotted disk 15. The part of the arm 2O parallel with the shaft is in a suitable way fastened to the casing 12. This is made possible by means of arranging the plates 16 and 17 eccentrical in relation to the disk 15 in such a way that an interspace is formed between them. In order to support the arm 20 and the bearing 23 a pin 22 may also be provided on the arm in such a way that it has its bearing in a boring in the shaft 14, as shown in the drawing. In this way the shafts may be subject to vibrations and when vibrating at greater velocities they will do it uniformlyand together in such a way that the function of the gearing is not disturbed. Of course, a similar effect may be obtained if the shaft 14 is prolongated and the arm 20 is provided with a bearing.

For the purpose of reversing the direction of rotation of the rolls one of the journals on each roll is extended and provided with a brake wheel. In the form shown the journals 24 nearest to the arm 20 are extended and on their outer ends. brake wheels 25 are provided, said wheels eventually having prothe shaft 13 said brake member having the same cross profile as the brake wheels. The

brake member has suoli a length and is arranged in such a way that the brake wheels strike the same at the same time as the rolls 18 leave the slots in the disk 15, and leave the brake member when they enter into the slots. When the brake member 26 is pressed against the wheels 25 the rolls will get stopped in their rotation as they leave the slots in the disk 15 and then their direction of rotation will be reversed in such a way that it coin cides with the direction of rotation of the rolls after their entrance in the slots. In this way all shocks at the entrance of the rolls in the slots are avoided and the vibrations are also done away with. The brake member 26 may of course be placed on the outer side of the fianges 16,'17 with lthe same result and it may be fastened to the easing or to some other part connected with the same, when the opposite journals of the rolls are provided with brake wheels in the manner described. Braking devices may also be provided on both of the said places.

In order to obtain the necessary friction either the brake member 26 itself may consist of elastic material, such as leather, caoutchouc or the like or it may be rigid bnt elastically fastened to the arm 2O or the easing 15.A i

According to Figs. 3 and 4 the brake meniber consists of two rigid segments together forming a semicircle. Said segments are hinged on pins 27 and acted upon from below by a plate spring 28V. In this form the shaft 13 must be driving and in'this case the velocity of rotation is to be reduced wherefore the brake member is placed between the shaft and thebrake wheels. lVhen, however, the shaft 14 is driving and the velocity is to be increased the brake member is placed outside the brake wheels of the rolls, as otherwise the direction of rotation of the rolls would not be reversed in the right way. Of course, the points of view mentioned above in connection withthe inner brake member and relating to the pressure and the elasticity7 etc., are also applicable in this case. Vhen the brake member is arranged eXternally the brake Wheels may be left out and the rolls themselves used as such, if the brake member is placed opposite the same.

Such a bra-ke arrangement acting upon the rolls 18 or brake wheels 25 is shown in Fig. 6. Here the brake member also consists ofa rigid arm 29 pivoted on a pin 30 and acted upon by a spring 31. In order to prevent the brake arrangement from being a hindrance to the rotation of the slotted disk it `must be shorter than in the case first described and in order to bring about that at least one of the rolls always may rest against the brake member in such a way that unnecessary and disturbing movements of the latter may be prevented, the brake member in this case is made in one piece and not in two segments.

The same result can, of course, also be obtained by an integral brake member at inner braking. Such a brake member is shown in Figs. 7 and `8. The brake member here consists of one single piece and is acted upon by spiral springs 33 placed on pins or abutments 34 connected with the brake member, said pins being guided in holes in the arm 20.

Having thus described the invention, I claim l. Roller gearing comprising a casing and a shaft carrying a wheel consisting of two plates between which a number of rolls is mounted, and another shaft carrying a cup shaped wheel provided with a disk extending from the circumference of said wheel toward' the shaft and having a number of radial slots open-toward the center of the shaft, said rolls engaging in the slots and by rotation of the shafts moving according to the theor f of the straight epicycloid.

Roller gearing comprising a casing and a shaft carrying a wheel consisting of two plates between which a number of rolls is mounted, and another shaft carrying a cup shaped wheel provided with a radially slotted disk extending from the circumference of said disk toward the shaft, an arm fastened to the casing and extending between the circumference of the plates carrying the rolls and the edge of the slotted disk, and a bearing on said arm, the shaft carrying the rolls extending through the plates and supported in the bearing.

3. Roller gearing comprising a casing and a shaft carrying a wheel consisting of two plates between which a number of rolls is mounted, and another shaft carrying a cup shaped wheel provided with a radially slotted disk extending from the circumference of said disk toward an arm fastened to the casing and a bearing on said arm, said bearing being located in the hollow end of the shaft carrying the slotted disk, and supporting the shaft carrying the rolls.

Il. Roller gearing comprising a casing and a shaft carrying a wheel consisting of two plates between which a number of rolls is mounted, and another shaft carrying a cup shaped wheel provided with a radially slotted disk extending from the circumference of said wheel toward the shaft, an arm fastened to the casing, a bearing on the arm to support the shaft carrying the rolls, and an elastic curved bra-ke member arranged in the casing at such a distance from the shaft carrying the rolls that said rolls strike said brake member when they leave the slots.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

FRANS AUG. FRANZEN. lVitnesses FRE AFLERON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente, Washington, D. C. 

